Moving EV SQL databases to new SQL server

Hi

My customer wants to move their EV databases from an old SQL2005 SP4 server to a new SQL2012 x64 server. They are using EV10.0.4

When SQL was installed they used a DNS alias for the SQL server and so when moving the databases will they still need to update the SQL server name in the databases using either the Symamtec scripts\registry entires or can they simple update the DNS alias to point to the new SQL server?

many thanks

KL